外文题目: Electrically insulating properties of the 5d double perovskite Sr2YOsO6
作者: Li, Jinghua; Wang, Xia; Wang, Hongyuan; Matsushita, Yoshitaka; Alexei, Belik A.; Kolodiazhnyi, Taras; Xu, Gang; Shi, Youguo; Guo, Yanfeng; Yamaura, Kazunari; Chen, Ying
刊名: J. Appl. Phys.
年: 2017 卷: 122 期: 10 文章编号：103905
英文关键词:

GENERALIZED GRADIENT APPROXIMATION; INDUCED PHASE-TRANSITION; MAGNETIC INTERACTION; CRYSTAL-STRUCTURES; ROOM-TEMPERATURE; MAGNETORESISTANCE; DISTORTION; DRIVEN; GROWTH; OXIDES
英文摘要:
A high-pressure-synthesized double perovskite Sr2YOsO6 was investigated by synchrotron X-ray diffraction and measurements of its magnetic susceptibility, specific heat capacity, complex impedance, and complex dielectric constant. It crystallized into a monoclinic double perovskite structure (P2(1)/n) with complete ordering of the Y and Os atoms. Its magnetic behaviors, including the antiferromagnetic transition temperature (similar to 52 K), Curie-Weiss effective moment [3.48(5) mu B/Os], and Weiss temperature [- 350.1(7) K], were close to the respective values of Sr2YOsO6 previously synthesized without an applied pressure of 6 GPa. Transport property measurements revealed that the lower limit of the activation energy was 192(1) meV and the charge gap remained open regardless of the presence of magnetic order, conflicting with the electron delocalization predicted by theoretical calculations. Further consideration, including theoretical and experimental investigations of the roles of spin-orbit coupling and U of the 5d electrons of Os 5d-t(2)g(3), may assist in understanding the general magnetic and insulating behaviors of quasi-half-filled 5d-t(2)g(3) oxides in the perovskite category toward the use of 5d double perovskite for magnetic applications. Published by AIP Publishing.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1063/1.5001913


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